Threshing-machine.



N. & G. BEAM. THEESHING MACHINE. APPLIOATION FILED AUG. 22, 1912.

Patented Apr. 15, 1913.

INVENTORJ A TTORNEY.

NATHANIEL BEAM AND GIIJEON BEAM, 0]? WATEBLOO, ONTARIO, CANADA.

THRESHING-MACI-IINE.

Specification of Letters Patent.

Patented Apr. 15,1913.

Application filed August 22, 1912. Serial No. 716,529.

To all whom it may concern Be it known that we, NATHANIEL BEAM and GmnoNBEAM, of the town of Waterloo, in the Province of Ontario, Canada, haveinvented certain new and useful Improvements in Threshing-Machines, ofwhich the following is a specification.

'each pair of pickers is located a gate or retainer hinged at its upperedge to the frame of the machine and tending to prevent the straw frombeing thrown back to the rear end of the machine by the pickers.

Figure 1 is a longitudinal section of our improved machine. Fig. 2 is anenlarged plan view of part of the traveling straw deck, and Fig. 3 is across section through the parts shown in Fig. 2.

In the drawings, like letters of reference indicate corresponding partsin the different figures.

The machine in its main features is of well known construction-A beingthe cylinder, B the concave, C an endless traveling grain deck, D avibratory chaifer, and E the shoe.

The straw deck comprises a series of cross bars F connected to sprocketchains G. Each bar is of zig-zag form and the bars are so set that thezig-zags H of each bar overlap the zig-zags of the adjacent bars andthus break the gaps between the bars. This arrangement not only aidsmaterially in the separation of the grain from the straw, but alsoenables us to reduce the number of cross bars needed to a minimum as thespacing of thebars may be increased as compared with straight barswithout danger of straw falling through. The chains G are carried by thesuitably journaled and located sprocket wheels I.

At the rear end of the straw deck is located a rotary picker J whichstrips the straw from the bars of the straw deck and prevents it beingcarried underneath, the zig-zags H extending forwardly as described arereadily stripped by the picker which so rotates that it moves upwardlyat its'forward side.

Above the straw deck are located a plurality of rotary pickers K whichso rotate as to throw the straw rearwardly along the deck. These pickersare preferably arranged in pairs so that one strips the other. Behindeach pair of pickers is located a gate or retainer L hinged at its upperedge to the frame of the machine. These gates tend to throw down uponthe grate the straw which has been picked up and thrown rearwardly bythe pickers, but yield readily to allow the straw to be moved to therear by the travel of the deck. By this combination we obtain an evenmore complete separation than is possible with vibratory straw deckswith much less wear and tear and expenditure of power.

What we claim as our invention is 1. In a thresher a straw deckcomprising a series of transverse bars of zig-zag form, and suitablycarried endless chains carrying said bars. a

2. In a thresher a straw deck comprising a series of transverse bars ofzig-zag form, and suitably carried endless chains carrying said bars incombination with a rotary picker located at the rear of the deck andadapted to prevent straw passing around to the underside of the deck.

3. In a thresher a straw deck comprising a series of transverse bars ofzig-zag form, the zig-zags of the bars overlapping to break the gapsbetween the bars, and suitably carried endless chains carrying saidbars.

Dated at Waterloo this tenth day of July NATHANIEL BEAM. GIDEON BEAM.Signed in the presence of Gno. A. BRUCE, FRED M. HAHN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

